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GB/T 37848-2019 English PDF

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GB/T 37848-2019: Determination of strontium isotopic ratios in aqueous solution
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Basic data

Standard ID GB/T 37848-2019 (GB/T37848-2019)
Description (Translated English) Determination of strontium isotopic ratios in aqueous solution
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard N50
Classification of International Standard 13.280
Word Count Estimation 10,149
Date of Issue 2019-08-30
Date of Implementation 2020-03-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 37848-2019: Determination of strontium isotopic ratios in aqueous solution

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of strontium isotopic ratios in aqueous solution ICS 13.280 N50 National Standards of People's Republic of China Determination of cesium isotope abundance ratio in water Published on.2019-08-30 2020-03-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the Ministry of Science and Technology of the People's Republic This standard is under the jurisdiction of the National Instrument Analysis and Testing Standardization Technical Committee (SAC/TC481). This standard was drafted. China Institute of Metrology, University of Science and Technology of China, Institute of Earth Environment, Chinese Academy of Sciences, North of Nuclear Industry Beijing Institute of Geology, Guiyang Institute of Geochemistry, Chinese Academy of Sciences, Institute of Geology and Geophysics, Chinese Academy of Sciences, China Geological Survey Tianjin Geological Survey Center. The main drafters of this standard. Bohai, Wang Jun, Yu Huimin, He Maoyong, Cui Jianyong, Zhao Zhiqi, Guo Chunhua, Zhou Hongying. Determination of cesium isotope abundance ratio in water

1 Scope

This standard specifies the determination of strontium isotope abundance by thermal ionization isotope mass spectrometry and multi-receiving inductively coupled plasma mass spectrometry for cesium in water. The method of comparison. This standard applies to the determination of the isotope abundance ratio of rhodium in aqueous solution.

2 Thermal ionization isotope mass spectrometry

2.1 Principle The sample was separated by 锶 special effect resin, and 87Sr/86Sr and 88Sr/86Sr were analyzed by thermal ionization isotope mass spectrometry. Depending on the cesium isotope reference material calibration or 88Sr/86Sr=8.37521 internal standard calibration. 2.2 Reagents and materials When using reagents and standards, dilute to the specified concentration as required. Diluted with 2% nitric acid unless otherwise stated. 2.2.1 Water, primary water specified in GB/T 6682. 2.2.2 Nitric acid (HNO3), concentration 65.0%~68.0% (mass fraction), excellent grade pure. 2.2.3 High purity nitric acid (HNO3), nitric acid (see 2.2.2) is treated by secondary sub-boiling distillation. 2.2.4 Nitric acid (HNO3), 8 mol/L, prepared from water (see 2.2.1) and high purity nitric acid (see 2.2.3). 2.2.5 Nitric acid (HNO3), 0.5 mol/L, prepared from water (see 2.2.1) and high purity nitric acid (see 2.2.3). 2.2.6 Oxalic acid (H2C2O3), pure spectrum. 2.2.7 Phosphorus pentoxide (P2O5), pure spectrum. 2.2.8 Phosphoric acid (H3PO4), 4 mol/L, prepared from water (see 2.2.1) and phosphorus pentoxide (see 2.2.7). 2.2.9 Bismuth pentoxide (Ta2O5)-water suspension, prepared from spectrally pure Ta2O5 and water (see 2.2.1). 2.2.10 Helium isotope reference material, which is traceable to national standard materials approved by the national standard substance management department. 2.2.11 锶 special effect resin, about.200μm. 2.2.12 Separation column, quartz material. 2.2.13 Quartz glass beakers should be kept clean. 2.2.14 3mol/L HNO3-0.05mol/L H2C2O4 mixture from water (see 2.2.1), high purity nitric acid (see 2.2.3) and oxalic acid (see 2.2.6) Formulation. 2.3 Equipment 2.3.1 Thermal ionization isotope mass spectrometer. It can scan the mass range of 5u~350u, the minimum resolution is 1u peak at 5% peak height. For the working parameters of the wide, thermal ionization isotope mass spectrometer, see Appendix A. The belt or belt used is not less than 99.999%. 2.3.2 Temperature-controlled hot plate. The maximum temperature is not lower than 180 °C. 2.3.3 Filament degassing device. 2.3.4 Electronic balance. The sensitivity is 1 mg. 2.3.5 Micropipettes.

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